linux-stable/drivers/block/null_blk_trace.c
Chaitanya Kulkarni c51d041998 null_blk: add tracepoint helpers for zoned mode
This patch adds two new tracpoints for null_blk_zoned.c that allows us
to trace report-zones, zone-mgmt-op and zone-write operations which has
direct effect on the zone condition state machine.

Also, we update drivers/block/Makefile so that new null_blk related
tracefiles can be compiled.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-03-27 13:39:10 -06:00

21 lines
464 B
C

// SPDX-License-Identifier: GPL-2.0
/*
* null_blk trace related helpers.
*
* Copyright (C) 2020 Western Digital Corporation or its affiliates.
*/
#include "null_blk_trace.h"
/*
* Helper to use for all null_blk traces to extract disk name.
*/
const char *nullb_trace_disk_name(struct trace_seq *p, char *name)
{
const char *ret = trace_seq_buffer_ptr(p);
if (name && *name)
trace_seq_printf(p, "disk=%s, ", name);
trace_seq_putc(p, 0);
return ret;
}